Simple SPI Ethernet Device (SSED) Driver

This repository contains the sources for a Linux Network Driver for the Simple SPI Ethernet Device (SSED). The purpose of the driver is to give a simple example how to program a network driver for Linux. A WIZnet Surf 5 board or a custom PCB can be used to act as the SSED.

Used Hard- and Firmware

Any board with the WIZnet W7500 microcontroller can be used to act as the SSED. The following hardware boards can be used for the SSED:

• Custom PCBs (MAC and PHY card) in this repository
• WIZnet Surf 5

A ST-Link programmer can be used to flash the firmware on the WIZnet W7500 microcontroller. The firmware can be found in the firmware folder.

Connecting SSED

In theory the SSED can be connected to any single board computer exposing an SPI interface and a GPIO pin. I am using a Raspberry Pi to connect the SSED to it. The two officially supported boards must be connected in the following way to the Raspberry Pi.

MAC card

TBD

Surf 5

TBD

Structure of the repository

The following files can be found in this repository:

• This README
• ssed.dts: Device Tree Source File for a Device Tree overlay which adds the SSED
• ssed.c: Sources for the SSED driver
• Makefile: Makefile to build the driver and the Device Tree Overlay

Using the driver

• Build the driver and the Device Tree overlay:

  make
  

• Apply the Device Tree overlay (e.g. on a Raspberry Pi with Raspberry Pi OS):

  sudo dtoverlay ssed.dtbo
  

• Load the driver

  sudo insmod ssed.ko
  

Support my work

If you want to support me, you can buy me a coffee buymeacoffee.com/johannes4linux.